MODX Revolution version 2.x - 2.5.6 is vulnerable to blind SQL injection caused by improper sanitization by the escape method resulting in authenticated user accessing database and possibly escalating privileges.

Cross-site scripting (XSS) vulnerability in manager/index.php in MODx Revolution 2.0.2-pl allows remote attackers to inject arbitrary web script or HTML via the modhash parameter.

MODX Revolution through 2.8.3-pl allows remote authenticated administrators to execute arbitrary code by uploading an executable file, because the Uploadable File Types setting can be changed by an administrator.